From: Hugh Caley <Hugh_Caley@affymetrix.com>
To: nfs@lists.sourceforge.net
Subject: How many nfsd's can I run?
Date: Tue, 21 Jun 2005 19:02:04 -0700 [thread overview]
Message-ID: <42B8C69C.6010302@affymetrix.com> (raw)
Often when a cluster run (100+ nodes) is started my NFS server will get
very slow; users with their home directories on the server will lock up
for short periods, and the load average crawls higher.
The output of cat /proc/net/rpc/nfsd:
th 125 264502 142948.997 38666.037 22620.179 16494.577 10072.689
5700.113 2623.322 1094.785 474.752 1900.536
This would seem to mean that my nfsd threads are runnning at 100% for
much of the time, meaning I need more nfsd's, correct? But is there a
limit to the amount of nfsd's I should run? I had had it as high as 150
at one time, but it seemed to me this made the server less stable.
There may have been other reasons for this, however.
Anyway I have since doubled the ram on the server (to 8 gig). Machine
is a dual Xeon 2.6 Ghz machine running Fedora Core 2, kernel version
2.6.10-1.771_FC2smp, gigabit ethernet. Can I run more nfsd's, or should
I be looking for other problems?
Hugh
--
Hugh Caley | Unix Systems Administrator | CIS
AFFYMETRIX, INC. | 6550 Vallejo St. Ste 100 | Emeryville, CA 94608
Tel: 510-428-8537 | Hugh_Caley@affymetrix.com
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next reply other threads:[~2005-06-22 2:02 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-06-22 2:02 Hugh Caley [this message]
2005-06-22 2:27 ` How many nfsd's can I run? Neil Brown
2005-06-22 19:12 ` Hugh Caley
2005-06-24 1:48 ` Neil Brown
2005-06-22 13:07 ` Roger Heflin
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